采用上下加温，双温控制，使温度更加均匀。
Adopt two-sided to heat, two-way temperature control, Make temperature more even.
独家金属热块双恒温控制和安全热保险丝。
Exclusive metal thermo-block with double thermostatic control and safety thermo-fuse.
独家金属热块双恒温控制和安全热保险丝。
Exclusive metal thermo-block with double thermostatic control and safety thermo-fuse.
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